cdn_commands.md

Executing Commands

Applications interact with the web client either through its command queue (embedded script install), or its API (JavaScript module install).

Embedded script command queue

The command queue is accessed through a global variable (named cwr by default). The command queue is a function which stores commands that will be executed asynchronously by the web client. Commands may be sent to the web client using the command queue after the snippet has executed.

JavaScript module API

Commands may be sent to the web client using the API after the AwsRum class has been instantiated.

Examples

In the following example, the snippet has disabled automated page view recording and has not provided AWS credentials. Following the snippet, the application manually records a page view and forwards AWS credentials to the web client.

Embedded script example

<script>
    (function(n,i,v,r,s,c,u,x,z){...})(
        'cwr',
        '00000000-0000-0000-0000-000000000000',
        '1.0.0',
        'us-west-2',
        'https://client.rum.us-east-1.amazonaws.com/1.0.2/cwr.js',
        {
            disableAutoPageView: true
        }
    );
    cwr('recordPageView', window.location.hash);
    const awsCreds = localStorage.getItem('customAwsCreds');
    if(awsCreds) cwr('setAwsCredentials', awsCreds)
</script>

JavaScript module example

const awsRum: AwsRum = new AwsRum(
    APPLICATION_ID,
    APPLICATION_VERSION,
    APPLICATION_REGION,
    { disableAutoPageView: true }
);
awsRum.recordPageView(window.location.hash);
const credentialProvider = new CustomCredentialProvider();
if(awsCreds) awsRum.setAwsCredentials(credentialProvider);

Commands

Command	Parameter Type	Example	Description
allowCookies	Boolean	cwr('allowCookies', true); awsRum.allowCookies(true)	Enable the web client to set and read two cookies: a session cookie named cwr_s and a user cookie named cwr_u. cwr_s stores session data including an anonymous session ID (uuid v4) created by the web client. This allows CloudWatch RUM to compute session metrics like errors per session. cwr_u stores an anonymous user ID (uuid v4) created by the web client. This allows CloudWatch RUM to count return visitors. true: the web client will use cookies false: the web client will not use cookies
disable	None	cwr('disable'); awsRum.disable();	Stop recording and dispatching RUM events.
dispatch	None	cwr('dispatch'); awsRum.dispatch();	Flush RUM events from the cache and dispatch them to CloudWatch RUM using fetch.
dispatchBeacon	None	cwr('dispatchBeacon'); awsRum.dispatchBeacon();	Flush RUM events from the cache and dispatch them to CloudWatch RUM using sendBeacon.
enable	None	cwr('enable'); awsRum.enable();	Start recording and dispatching RUM events.
addSessionAttributes	MetadataAttributes	cwr('addSessionAttributes', { applicationVersion: '1.3.8' }); awsRum.addSessionAttributes({ applicationVersion: '1.3.8' });	Add custom attributes to the metadata of all events in the session.
recordPageView	String | PageView	Record a page view: cwr('recordPageView', '/home'); awsRum.recordPageView('/home') Record a page view with tags: cwr('recordPageView', { pageId: '/home', pageTags: ['en', 'landing'] }); awsRum.recordPageView({ pageId: '/home', pageTags: ['en', 'landing'] }); Record a page view with custom metadata attributes: cwr('recordPageView', { pageId: '/home', pageAttributes: { pageOrder: 1, template: 'studio' }}); awsRum.recordPageView({ pageId: '/home', pageAttributes: { pageOrder: 1, template: 'studio' }});	Record a page view event. If you wish to manually record page views instead of using the web client's page view automation, you must disable the automation using the disableAutoPageView configuration option, and instrument your application to record page views using the recordPageView command. You can tag pages by setting the pageTags property, which is an array of strings. Later, you can use these tags to group pages when aggregating data. You can add custom attributes to the metadata of all events that occur on this page.
recordError	Error | ErrorEvent | String	try {...} catch(e) { cwr('recordError', e); } try {...} catch(e) { awsRum.recordError(e); }	Record a caught error.
recordEvent	Event	cwr('recordEvent', {type: 'your_event_type', data: {field1: 1, field2: 2}}) awsRum.recordEvent('your_event_type', {field1: 1, field2: 2})	Record a custom event. ⚠️ The app monitor must have custom events enabled. Event types must conform to the following regex: ^[a-zA-Z0-9_.-]{1,256}$. Each custom event, including metadata, must be less than 6 KB. Events over 6KB are dropped by CloudWatch RUM.
registerDomEvents	Array	cwr('registerDomEvents', [{ event: 'click', cssLocator: '[label="label1"]' }]); awsRum.registerDomEvents([{ event: 'click', cssLocator: '[label="label1"]' }]);	Register target DOM events to record. The target DOM events will be added to existing target DOM events. The parameter type is equivalent to the events property type of the interaction telemetry configuration.
setAwsCredentials	Credentials | CredentialProvider	cwr('setAwsCredentials', cred); awsRum.setAwsCredentials(cred);	Forward AWS credentials to the web client. The web client requires AWS credentials with permission to call the PutRumEvents API. If you have not set identityPoolId in the web client configuration, you must forward AWS credentials to the web client using this command.

PageView

Field Name	Type	Default	Example	Description
pageId	String	This is a required field.	'/home'	A unique identifier for the current view.
pageTags	String[]	[]	['en', 'landing']	An array of tags for the current view.
pageAttributes	{ [key: string]: string | number | boolean }	N/A	{ 'pageOrder': 1, 'template': 'studio' }	An attribute which will be added to the metadata of all events which are recorded on this page. Keys must conform to the following regex: ^(?!pageTags)(?!aws:)[a-zA-Z0-9_:]{1,128}$. Values can have up to 256 characters and must be of type string, number, or boolean.

You may add up to 10 custom attributes per event. The 10 attribute limit applies to the combined total of session attributes and page attributes. Any attributes that exceed this limit will be dropped. For example, 6 custom session attributes + 4 custom page attributes totals 10 custom attributes and falls within the limit. However, 6 custom attributes + 5 custom page attributes total 11 custom attributes and one of these custom attributes will be dropped.

AWS reserves the namespace prefix aws: for its attributes. Do not create custom attributes with the aws: prefix, or they may be overwritten by future versions of the CloudWatch RUM web client.

The RUM web client also records a set of default attributes. You cannot overwrite default attributes with custom attributes.

Event

Field Name	Type	Default	Example	Description
type	String	This is a required field.	'your_event_type'	A unique identifier for the event type. Event types must conform to the following regex: ^[a-zA-Z0-9_.-]{1,256}$.
data	Object	This is a required field.	{ field1: 1, field2: 2 }	A JavaScript object. This object will be serialized as JSON and sent to CloudWatch RUM.

⚠️ The CloudWatch RUM app monitor must have custom events enabled.

To send custom events to a CloudWatch RUM app monitor, you must first configure your app monitor to accept custom events. See Send custom events in the CloudWatch RUM user guide.

Note that the call signature differs depending on the installation method.

Embedded script -- wrap the type and data arguments in an object. For example:

cwr('recordEvent', {type: 'your_event_type', data: {field1: 1, field2: 2}})

JavaScript module -- pass type and data to recordEvent as arguments. For example:

awsRum.recordEvent('your_event_type', {field1: 1, field2: 2})